The four-piece SHOCKWAVE Impact Duty 1/4 in hex drive drill bit set offers convenience and heavy-duty performance on the jobsite. Milwaukee SHOCKWAVE Impact Duty 1/4 in hex drive drill bits are engineered for extreme durability and up to 10X longer life. Made from proprietary steel and heat treated to control hardness, the SHOCKWAVE Impact Duty hex drive drill bits feature the Milwaukee Thunderbolt web for durability and chip removal paired with taper fit construction for a stronger bit with less wobble. The 135 deg split point tip delivers a precision start and prevents walking for fast, accurate holes. The SHOCKWAVE hex drive drill bits are ideal for heavy-duty impact applications and highly recommended for use with portable drills. The set includes bit sizes 1/8 in, 5/32 in, 3/16 in and 1/4 in.